Question

The reaction `Ararr B` follows first order kinetics. The time taken for `0.8 mol` of `A` to produce `0.6 mol` of `B` is `1 hr`. What is the time taken for the conversion of `9.0 mol` of `A` to Product `0.675 mol` of `B` ?
A. 0.5 h
B. 0.25 h
C. 1 h
D. 2 h

Answer 1

Correct Answer - C
Time required for the conversion of 0.8 mol of A into 0. 6mol of `B=(0.6)/(0.8)=0.75rArrt_(75%)`
Similarly, the time required for the conversion of 0.9 mol of A to 0.675 mol of B is `(0.675)/(0.9)=0.75rArrt_(75%)`
Hence, both cases requires 1 h.